Linux防火墙命令

• 开启防火墙

systemctl start firewalld.service

• 防火墙开机启动

systemctl enable firewalld.service

• 关闭防火墙

systemctl stop firewalld.service

• 查看防火墙状态

firewall-cmd --state

• 查看现有的规则

iptables -nL
firewall-cmd --zone=public --list-ports

• 重载防火墙配置

firewall-cmd --reload

• 添加单个单端口

firewall-cmd --permanent --zone=public --add-port=81/tcp

• 添加多个端口

firewall-cmd --permanent --zone=public --add-port=8080-8083/tcp

• 删除某个端口

firewall-cmd --permanent --zone=public --remove-port=81/tcp

• 针对某个IP开放端口

firewall-cmd --permanent --add-rich-rule="rulefamily="ipv4" source address="192.168.142.166" portprotocol="tcp" port="6379" accept"
firewall-cmd--permanent--add-rich-rule="rulefamily="ipv4" source address="192.168.0.233" accept"

• 删除某个IP

firewall-cmd --permanent --remove-rich-rule="rulefamily="ipv4" source address="192.168.1.51" accept"

• 针对一个ip段访问

firewall-cmd --permanent --add-rich-rule="rule family="ipv4" source address="192.168.0.0/16" accept"
firewall-cmd --permanent --add-rich-rule="rule family="ipv4" source address="192.168.1.0/24" port protocol="tcp" port="9200" accept"

• 添加操作后别忘了执行重载

firewall-cmd --reload

• 端口转发

# 将80端口的流量转发至8080
firewall-cmd --add-forward-port=port=80:proto=tcp:toport=8080
# 将80端口的流量转发至192.168.0.1
firewall-cmd --add-forward-port=port=80:proto=tcp:toaddr=192.168.0.1 
# 将80端口的流量转发至192.168.0.1的8080端口
firewall-cmd --add-forward-port=port=80:proto=tcp:toaddr=192.168.0.1:toport=8080